CN101992279A - Slab sealing dummy ingot method for preventing steel leakage in starting - Google Patents
Slab sealing dummy ingot method for preventing steel leakage in starting Download PDFInfo
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- CN101992279A CN101992279A CN2009100134221A CN200910013422A CN101992279A CN 101992279 A CN101992279 A CN 101992279A CN 2009100134221 A CN2009100134221 A CN 2009100134221A CN 200910013422 A CN200910013422 A CN 200910013422A CN 101992279 A CN101992279 A CN 101992279A
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- CN
- China
- Prior art keywords
- bar head
- dovetail groove
- dummy bar
- spring
- dummy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 title abstract 2
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000005266 casting Methods 0.000 description 4
- 210000001161 mammalian embryo Anatomy 0.000 description 4
- 238000009749 continuous casting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- -1 silk footpath φ 6 Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The invention relates to a slab seal dummy ingot method for preventing steel leakage in starting, which is characterized by sequentially comprising the following steps of: 1) a paper rope is used for plugging a gap between the dummy bar head and the crystallizer; 2) uniformly paving a layer of pins at the bottom of the dovetail groove of the dummy bar head and the surface of the dummy bar head; 3) uniformly spreading a layer of springs at the bottom of the dovetail groove, and vertically placing a layer of springs until the bottom of the dovetail groove is filled; 4) the springs are regularly discharged on the dummy bar head surface until the dummy bar head surface is covered. The spring is made of QB steel, and the ratio of the wire diameter to the thread pitch is 1: 2. The size of the spring is designed according to the size of the dovetail groove. The invention has the beneficial effects that: the molten steel is uniformly cooled in the dovetail groove, a good top sealing effect is achieved, the dummy ingot can be smoothly removed, adhesion is avoided, the surface tension of the molten steel is improved by the spring, starting steel leakage is further reduced, and the effect is obvious.
Description
Technical field
The invention belongs to the continuous casting of iron and steel technical field, specially refer to the new technology of the slab envelope dummy ingot of the bleed-out that prevents to start to walk.
Background technology
Plugging dummy bar head is a crucial operating procedure during continuous casting is produced, what at present plugging dummy bar head often used during continuous casting is cold iron and pin, purpose be make the molten steel rapid solidification and not with dummy bar head dovetail groove weldbonding together, but because cold iron and pin are put more concentrated, inhomogeneous cooling was even when molten steel entered the dummy bar head dovetail groove, and the starting bleed-out takes place easily, and the pin skewness makes molten steel and the bonding weldering of dummy bar head dead, dummy bar head and strand are not easily separated during deingot, and influence is produced.Chinese patent application CN101332496A discloses a kind of method of plugging dummy bar head, employing is at shop, dummy bar head dovetail groove bottom one deck heat-insulating cloth, one section rail head places the dovetail groove center position, at dummy bar head surface shop one deck iron filings or sand, around rail head, be radial evenly distributed cold burden then then.This method requires low to the operator, grasp easily, but have the chill problem of uneven distribution, and former carrying on as before such as invar water constituent and temperature can cause bleed-out and hold watering failure.
Summary of the invention
The objective of the invention is to disclose a kind of slab envelope dummy ingot method of the bleed-out that prevents to start to walk, molten steel is cooled off in dovetail groove evenly and rapidly, play the good effect of binding, again the purpose of deingot smoothly.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of slab envelope dummy ingot method of the bleed-out that prevents to start to walk is characterized in that this method may further comprise the steps:
1) with the slit between paper string plugging dummy bar head and the crystallizer;
2) evenly spread one deck pin on the dovetail groove bottom and the dummy bar head surface of dummy bar head;
3) even tiling one deck spring in dovetail groove bottom, vertically-arranged one deck spring again is up to the dovetail groove bottom is filled and led up;
4) at dummy bar head rule of surface ground discharging spring, up to the dummy bar head surface is covered with.
Described spring material is that QB class steel is made, and the silk footpath is 1: 2 with pitch ratio.
Described spring size is according to the dovetail groove size design.
Compared with prior art, the invention has the beneficial effects as follows: spring size and pitch reasonable in design, being convenient to molten steel can infiltrate in the dummy bar head dovetail groove smoothly, avoids occurring the unhook phenomenon.Spring even compactness arranged evenly is cooled off molten steel uniformly in dovetail groove, play the good effect of binding, and reduces starting bleed-out deingot smoothly again, avoids adhesion, and effect is remarkable.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the structural representation of the embodiment of the invention two;
Fig. 3 is the structural representation of the embodiment of the invention three.
The short spring 5-of the long spring 4-of 1-dummy bar head 2-dovetail groove 3-paper string 6-crystallizer 7-pin among the figure
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
See Fig. 1, be the method for casting embryo 200mm a kind of slab plugging dummy bar head 1 of the bleed-out that prevents to start to walk when thick, this method may further comprise the steps:
1) with the slit between paper string 5 plugging dummy bar heads 1 and the crystallizer 6;
2) evenly spread one deck pin 7 on dovetail groove 2 bottoms and dummy bar head 1 surface of dummy bar head 1;
3) the short spring 4 of one deck that evenly tiles in dovetail groove 2 bottoms, the short spring 4 of vertically-arranged one deck again is up to dovetail groove 2 bottoms are filled and led up;
4) at short spring 4 of dummy bar head rule of surface ground discharging and long spring 3, up to dummy bar head 1 surface is covered with.
The material of spring is made alternative frozen iron blocks for the Q235B steel, silk footpath φ 6, and pitch 12, according to the external diameter φ 50 of the shaped design spring of dovetail groove 2, short spring 4 long 120mm, long spring 3 long 240mm are to obtain the best filling and cooling effect.
See the method for plugging dummy bar head 1 when Fig. 2 is casting embryo 250mm.Because of the variation of dovetail groove 2 and dummy bar head 1 size, every layer of spring is distributed with variation.
See the method for plugging dummy bar head 1 when Fig. 3 is casting embryo 300mm.
Present invention focuses on the silk footpath of spring and the selection of pitch, the silk footpath is too little, can not reach enough thermal capacitances, and molten steel is cooled off fast; Pitch is too little, and molten steel is infiltrated fast, then easily causes bleed-out, through testing the relation that draws casting embryo parameter and spring consumption repeatedly, sees the following form one, table two:
Table one seals used spring reference quantity, kg
Table two seals used spring reference quantity, kg
Claims (3)
1. the slab of the bleed-out that prevents to start to walk envelope dummy ingot method is characterized in that this method may further comprise the steps:
1) with the slit between paper string plugging dummy bar head and the crystallizer;
2) evenly spread one deck pin on the dovetail groove bottom and the dummy bar head surface of dummy bar head;
3) even tiling one deck spring in dovetail groove bottom, vertically-arranged one deck spring again is up to the dovetail groove bottom is filled and led up;
4) at dummy bar head rule of surface ground discharging spring, up to the dummy bar head surface is covered with.
2. according to claim 1 described a kind of prevent to start to walk slab envelope dummy ingot method of bleed-out, it is characterized in that described spring material is that QB class steel is made, the silk footpath is 1 with pitch ratio: (1.2～3).
3. according to claim 1 described a kind of prevent to start to walk slab envelope dummy ingot method of bleed-out, it is characterized in that described spring size is according to the dovetail groove size design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100134221A CN101992279A (en) | 2009-08-26 | 2009-08-26 | Slab sealing dummy ingot method for preventing steel leakage in starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100134221A CN101992279A (en) | 2009-08-26 | 2009-08-26 | Slab sealing dummy ingot method for preventing steel leakage in starting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101992279A true CN101992279A (en) | 2011-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100134221A Pending CN101992279A (en) | 2009-08-26 | 2009-08-26 | Slab sealing dummy ingot method for preventing steel leakage in starting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101992279A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380590A (en) * | 2011-11-14 | 2012-03-21 | 振石集团东方特钢股份有限公司 | Method for pouring plate blank stainless steel |
| CN103878333A (en) * | 2014-03-25 | 2014-06-25 | 济钢集团有限公司 | Final-pouring capping method for reducing abrasion of copper plate of crystallizer of moderate-thickness slab caster |
| CN105195696A (en) * | 2015-11-06 | 2015-12-30 | 内蒙古包钢钢联股份有限公司 | Dummy ingot sealing method capable of preventing casting leakage of shaped blank |
| CN105798252A (en) * | 2016-05-17 | 2016-07-27 | 湖南华菱涟源钢铁有限公司 | Method for capping tail of continuous casting blank |
| CN108339954A (en) * | 2018-02-11 | 2018-07-31 | 福建三钢闽光股份有限公司 | It is a kind of improving continuous casting and open the cold burden of gravy with meat or vegetables poured over rice or noodles base condensation rate and intensity lay method |
| CN112916813A (en) * | 2019-12-05 | 2021-06-08 | 上海梅山钢铁股份有限公司 | Method for accurately selecting scrap iron material for continuous casting safety seal dummy ingot |
| CN113145812A (en) * | 2021-04-01 | 2021-07-23 | 东北大学 | Method for optimizing flow of continuous casting transient molten steel |
| CN115055655A (en) * | 2022-05-14 | 2022-09-16 | 江阴兴澄特种钢铁有限公司 | Casting device and method for oversized continuous casting round billet |
-
2009
- 2009-08-26 CN CN2009100134221A patent/CN101992279A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380590A (en) * | 2011-11-14 | 2012-03-21 | 振石集团东方特钢股份有限公司 | Method for pouring plate blank stainless steel |
| CN102380590B (en) * | 2011-11-14 | 2013-06-26 | 振石集团东方特钢股份有限公司 | Method for pouring plate blank stainless steel |
| CN103878333A (en) * | 2014-03-25 | 2014-06-25 | 济钢集团有限公司 | Final-pouring capping method for reducing abrasion of copper plate of crystallizer of moderate-thickness slab caster |
| CN105195696A (en) * | 2015-11-06 | 2015-12-30 | 内蒙古包钢钢联股份有限公司 | Dummy ingot sealing method capable of preventing casting leakage of shaped blank |
| CN105798252A (en) * | 2016-05-17 | 2016-07-27 | 湖南华菱涟源钢铁有限公司 | Method for capping tail of continuous casting blank |
| CN108339954A (en) * | 2018-02-11 | 2018-07-31 | 福建三钢闽光股份有限公司 | It is a kind of improving continuous casting and open the cold burden of gravy with meat or vegetables poured over rice or noodles base condensation rate and intensity lay method |
| CN112916813A (en) * | 2019-12-05 | 2021-06-08 | 上海梅山钢铁股份有限公司 | Method for accurately selecting scrap iron material for continuous casting safety seal dummy ingot |
| CN113145812A (en) * | 2021-04-01 | 2021-07-23 | 东北大学 | Method for optimizing flow of continuous casting transient molten steel |
| CN115055655A (en) * | 2022-05-14 | 2022-09-16 | 江阴兴澄特种钢铁有限公司 | Casting device and method for oversized continuous casting round billet |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |